Outus Silicone Heater Hose 1" ID — 25 ft Coil, Blue, High‑Temp Flexible Coolant Line

Outus 1" ID 25 ft blue silicone heater hose is a flexible, high‑temperature coolant and radiator hose designed for reliable engine heating and cooling connections.

This reinforced silicone hose combines thermal resilience and flexibility to replace brittle factory heater lines or to build custom coolant runs. Supplied as a 25 ft coil with a 25 mm (1") inner diameter, it fits many automotive heater, radiator, and vacuum applications where EPDM hoses fail from heat or aging. The bright blue finish also helps you quickly identify aftermarket lines in an engine bay or workshop.

How does this hose withstand hot engine conditions?

The Outus silicone construction resists high temperatures far better than standard rubber hoses, reducing cracking and hardening over time. A polyester braid reinforcement maintains shape under pressure while allowing flexibility for routing.

• Temperature range: -40°F to 400°F (-40°C to 200°C)
• Working pressure up to 85 PSI, burst up to 142 PSI
• Silicone compound resists aging, heat, and thermal cycling

Will this hose fit my vehicle or heating system?

This product is a 1" (25 mm) inner diameter hose with a 33 mm outer diameter and comes in a 25 ft coil to cut to length as needed. It’s intended for custom installations, heater core lines, radiator bypasses, and vacuum or breather lines where a 1" ID is required.

• 25 ft coil for multiple runs or long single applications
• Easy to trim for perfect, custom lengths
• Compatible with most engine cooling and heating ports sized for 1" ID

Is it easy to install and maintain?

The hose is flexible, kink‑resistant, and straightforward to secure with standard clamps, making installation fast even in tight engine bays. Silicone’s surface resists oil and grime and keeps its flexibility through repeated heat cycles, simplifying future maintenance.

• Cut with a utility knife or hose cutters for clean ends
• Use worm‑drive or T‑bolt clamps for reliable sealing
• Flexible routing reduces need for extra fittings or adapters

What fluids and environments can this hose handle?

Engineered for coolant and heated water systems, the hose also tolerates air, steam, and diluted acids/alkalis up to 25%. It performs in high‑temperature environments and remains dimensionally stable under typical automotive and industrial conditions.

• Suitable for coolant, hot water, steam, and air lines
• Resistant to common automotive coolants and weak acids/alkalis
• Not intended for concentrated aggressive chemicals

Who is this for: mechanics, hot‑rod builders, DIY enthusiasts, and fleet technicians looking for an upgrade to stock heater and radiator lines. If you need a durable, heat‑tolerant 1" hose for custom coolant routing or heater core repairs that stays flexible over time and is easy to work with, the Outus 25 ft silicone hose is a practical choice.